hydrogenchloride in 1,4-dioxane 1 h;

1: 1.) n-butyllithium / 11.) THF, hexane, -78 deg C, 1 h, 2.) THF, hexane, from -78 deg C to RT, 2 h 2: 1.) dicyclohexylborane, 2.) 30percent aq. H2O2, 10percent aq. NaOH / 1.) THF, from 0 deg C to RT, 1 h, 2.) THF, methanol, 0 deg C, 30 min. 3: 47 percent / HCl / dioxane / 1 h View Scheme

1: 1.) dicyclohexylborane, 2.) 30percent aq. H2O2, 10percent aq. NaOH / 1.) THF, from 0 deg C to RT, 1 h, 2.) THF, methanol, 0 deg C, 30 min. 2: 47 percent / HCl / dioxane / 1 h View Scheme